ELECTROPURE INC
SC 13D, 1997-07-15
PATENT OWNERS & LESSORS
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<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                     --------------------------------------

                                  SCHEDULE 13D
                                 (RULE 13d-101)

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                                ELECTROPURE, INC.
                                (Name of Issuer)

                     Common Stock, $0.01 par value per share
                         (Title of Class of Securities)

                                     286133
                                 (CUSIP Number)

                               Catherine Patterson
                                Electropure, Inc.
                           23251 Vista Grande, Suite A
                             Laguna Hills, CA 92653
                                 (714) 770-9347
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  June 2, 1997
             (Date of Event Which Requires Filing of this Statement)

      If the filing person has previously filed a statement on Schedule 13G
to report the acquisition which is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1 (b) (3) or (4), check the following
box [ ].

                         (Continued on following pages)

                               (Page 1 of 8 pages)

         The information required in the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


<PAGE>   2
                                       13D

     CUSIP NO. 286133                                          PAGE 2 OF 8 PAGES

- -------------------------------------------------------------------------------
 1   NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     RANDALL P. FRANK
- -------------------------------------------------------------------------------
 2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [ ]
                                                                        (b) [ ]
- -------------------------------------------------------------------------------
 3   SEC USE ONLY

- -------------------------------------------------------------------------------
 4   SOURCE OF FUNDS

     PF - $135,000
     00 - $   61,000
- -------------------------------------------------------------------------------
 5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
     TO ITEMS 2(d) or 2(e)                                                  [ ]

- -------------------------------------------------------------------------------
 6   CITIZENSHIP OR PLACE OR ORGANIZATION

     CALIFORNIA, USA
- -------------------------------------------------------------------------------
                           7       SOLE VOTING POWER
                   
                                   358,898
        NUMBER OF     ---------------------------------------------------------
         SHARES            8       SHARED VOTING POWER
      BENEFICIALLY 
        OWNED BY                   NONE
          EACH        ---------------------------------------------------------
        REPORTING          9       SOLE DISPOSITIVE POWER
         PERSON    
          WITH                     358,898
                      ---------------------------------------------------------
                          10       SHARED DISPOSITIVE POWER

                                   NONE
- -------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     358,898
- -------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES 
     CERTAIN SHARES*                                                        [ ]

- -------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     9.1% OF THE COMMON STOCK
     8.8% OF VOTING POWER
- -------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*

     IN
- -------------------------------------------------------------------------------

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>   3
                                                               PAGE 3 OF 8 PAGES


         On July 25, 1996, the issuer changed its corporate name to
"Electropure, Inc." and effected a one-for-ten reverse stock split. FOR PURPOSES
OF THIS REPORT, ALL ISSUANCES OF COMMON STOCK AND WARRANTS TO PURCHASE COMMON
STOCK ARE REFLECTED IN POST-REVERSE SPLIT AMOUNTS.

ITEM 1.  SECURITY AND ISSUER

         Common Stock, $0.01 par value, of Electropure, Inc., a California
corporation ("Electropure"). Electropure's principal executive office is located
at 23251 Vista Grande, Suite A, Laguna Hills, California 92653.

ITEM 2.  IDENTITY AND BACKGROUND

         (a)      Randall P. Frank

         (b)      1310 2nd Street, Manhattan Beach, CA 90266

         (c)      Insurance underwriter; Five Star Managers, LLC, 50 California
                  St., San Francisco, CA 94111.

         (d)      Not applicable

         (e)      Not applicable

         (f)      U.S.A.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

         Of the $196,000 used to acquire securities of Electropure, $61,000 was
gifted to Mr. Frank by his father, Anthony M. Frank. All of the funds utilized
to purchase shares of Common Stock from Electropure, including certain amounts
invested in EDI, were from Mr. Randall Frank's personal funds.

ITEM 4.  PURPOSE OF THE TRANSACTION

         Mr. Frank purchased 319,202 shares of Electropure Common Stock in a
private transaction on June 2, 1997 from his father, Anthony M. Frank. Prior to
such transaction, Mr. Randall Frank had owned less than one percent (1%) of the
securities of Electropure.

         Electropure is currently negotiating with its licensee, EDI Components,
to terminate a July, 1992 license agreement granting EDI exclusive manufacturing
and marketing rights to the Company's patented water purification technology. It
is anticipated that Electropure will pay EDI up to $2,950,000 to terminate the
license relationship in some combination of cash and equity over a period of
time. It is also anticipated that Electropure will hire the management and staff
of EDI; will grant EDI the right to appoint a Director(s) to the Company's
Board; will seek to obtain sufficient working capital through a private and/or
public sale of its securities; and that manufacturing and marketing of the water
purification technology will then be conducted by Electropure.
<PAGE>   4
                                                               PAGE 4 OF 8 PAGES



         Mr. Frank may in the future acquire, hold and dispose of shares of
Common Stock or warrants or options for such Common Stock or other securities of
Electropure and such transactions may be in the open market, privately or
directly from Electropure.

         Except as set forth above, Mr. Frank does not have any plans or
proposals which may have, which related to or which would result in:

         (a)      The acquisition by any person of additional securities of
                  Electropure, or the disposition of securities of Electropure;

         (b)      An extraordinary corporate transaction, such as a merger,
                  reorganization or liquidation, involving Electropure or any of
                  its subsidiaries;

         (c)      A sale or transfer of a material amount of assets of
                  Electropure or any of its subsidiaries;

         (d)      Any change in the present Board of Directors or management of
                  Electropure, including any plans or proposals to change the
                  number or term of directors or to fill any existing vacancies
                  on the Board;

         (e)      Any material change in the present capitalization or dividend
                  policy of Electropure;

         (f)      Any other material change in Electropure's business or
                  corporate structure;

         (g)      Changes in Electropure's charter, bylaws or instruments,
                  correspondence thereto or other actions which may impede the
                  acquisition or control of Electropure by any person;

         (h)      Causing a class of securities of Electropure to be delisted
                  from a national securities exchange or to cease to be quoted
                  in an inter-dealer quotation system of a registered national
                  securities association;

         (i)      A class of equity securities of Electropure becoming eligible
                  for termination of registration pursuant to Section 12(g)(4)
                  of the Securities Exchange Act of 1934; or

         (j)      Any action similar to any of those enumerated above.

ITEM 5.  INTEREST IN SECURITIES OF ISSUER

         (a)      Mr. Frank owns the following shares of Electropure:

                  358,898 shares of Common Stock with one vote per share(1).


- -------------
(1)  Includes warrants for 10,000 shares of Common Stock exercisable at $1.25
     per share; 1,250 shares exercisable at $9.00 per share; and 1,112 shares
     exercisable at $15.00 per share.

<PAGE>   5
                                                               PAGE 5 OF 8 PAGES


                  Mr. Frank owns beneficially 8.8% of the Common Stock; 9.1% if
                  all of the warrants described in in Item 6 are exercised. Mr.
                  Frank owns 5.0% of the voting power of all classes of stock of
                  Electropure.

         (b)      Mr. Frank has the sole voting and dispositive power over the
                  shares he owns.

         (c)      Since Setpebmer, 1990, Mr. Frank has entered into the
                  following transactions with regard to Electropure's Common
                  Stock:

                  In or around September, 1990, Mr. Frank was gifted, by his
                  father, a total of 3,334 shares of Electropure Common Stock
                  and 1,112 Warrants to purchase Common Stock at an exercise
                  price of $15.00 per share. The purchase price of such
                  securities was $25,000.

                  In May, 1992, Mr. Frank acquired, by gift, 10,000 Warrants to
                  purchase Common Stock of Electropure at $0.50 per share as a
                  result of his father's investment of $25,000 in EDI
                  Components, a privately-held California corporation. The
                  Company entered into various agreements in July, 1992 granting
                  EDI the exclusive manufacturing and marketing rights to the
                  Company's patented water treatment technology. In exchange for
                  cash consideration, certain royalty rights and the right to
                  terminate the license, the Company granted EDI's investors
                  warrants to purchase Common Stock equal to four (4) times such
                  investors' capital investment in EDI. On October 24, 1994, Mr.
                  Frank exercised such Warrants and received 10,000 shares of
                  Common Stock.

                  In October, 1992, Mr. Randall Frank invested an additional
                  $25,000 in EDI Components and received, as provided by the
                  above license arrangements, an additional 10,000 Warrants to
                  purchase Common Stock of Electropure at $0.50 per share. These
                  Warrants were also exercised on October 24, 1994 and, as a
                  result, Mr. Frank was issued an additional 10,000 shares of
                  Common Stock.

                  On December 17, 1992, Mr. Anthony Frank gifted Randall Frank
                  10,000 Warrants (at a value of $0.10 per Warrant) to purchase
                  Common Stock at $1.25 per share, exercisable until December
                  17, 2002.

                  On December 18, 1992, Mr. Anthony Frank converted an aggregate
                  of $315,000 in outstanding loans to the Company into 126,000
                  shares of Common Stock and 39,375 one-year Warrants to
                  purchase Common Stock at $9.00 per share. Concurently
                  therewith, Mr. Frank gifted 4,000 and 1,250 of such shares and
                  warrants, respectively, to Randall Frank.
<PAGE>   6
                                                               PAGE 6 OF 8 PAGES


          The following Warrants are currently exercisable by Mr. Frank:

<TABLE>
<CAPTION>
          --------------        ----------------      ---------------
           DATE GRANTED          PURCHASE PRICE        NO. OF SHARES
          --------------        ----------------      ---------------
          <S>                   <C>                    <C>
             12/01/89                $15.00                  1,112
             12/17/92                $ 1.25                 10,000
             12/18/92                $ 9.00                  1,250
</TABLE>

ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
         TO THE SECURITIES OF THE ISSUER

         Pursuant to the transactions described in Item 5 above, Mr. Frank has
the right, until December 17, 2002 to purchase 10,000 shares of Electropure's
Common Stock at $1.25 per share. Additionally, Mr. Frank has the right to
purchase 1,250 shares of Common Stock at $9.00 per share and 1,112 shares of
Common Stock at $15.00 per share for a period of one (1) year after the Company
has registered the Common Stock underlying such warrants.

         In addition to the 20,000 Warrants described in Item 5 above, as
partial consideration for his aggregate $50,000 investment in EDI Components in
1992, Mr. Frank received the following rights under the license agreement
between Electropure and EDI:

         (a)      A Stock Right Agreement providing the right to purchase, in an
                  amount equal to his investment in EDI, additional shares of
                  Electropure Common Stock at a 25% discount from the cash
                  purchase price at which the Company may, in the future, offer
                  such stock to bona fide third party purchasers;

         (b)      A Security interest in the Company's patented water
                  purification technology equal to Mr. Frank's $50,000
                  investment; and

         (c)      The right to payment by Electropure in the sum of $200,000
                  upon the termination of the license relationship with EDI. It
                  is anticipated that the Company will negotiate an arrangement
                  with Mr. Frank, and with the other investors of EDI
                  Components, to satisfy such payment in some combination of
                  cash and/or securities of the Company.

ITEM 7.  EXHIBITS

         10.12.A  Warrants for 1,112 shares (Warrant No. 261 - 12/01/89)

         10.12.B  Warrants for 1,250 shares (Warrant No. 295 - 12/18/92) - face
                  sheet only*

         10.12.C  Warrants for 10,000 shares (Warrant No. 357 - 12/17/92) - face
                  sheet only*

         10.12.D  Warrants for 10,000 shares (Warrant No. E-1005 - 05/14/92) -
                  face sheet only*

         10.12.E  Warrants for 10,000 shares (Warrant No. E-1010 - 10/27/92) -
                  face sheet only*

         10.12.F  Stock Right Agreement No. E-1005 - 05/14/92
<PAGE>   7
                                                               PAGE 7 OF 8 PAGES



         10.12.G  Stock Right Agreement No. E-1010 - 10/27/92 - face sheet only

- ---------------
*  The number of Warrants reflected have been modified to give
   effect to the one-for-ten reverse stock split conducted by the
   Company in July, 1996.


<PAGE>   8
                                                               PAGE 8 OF 8 PAGES


                                   SIGNATURES

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this Schedule 13D is true, complete
and correct.

Dated:  July 11, 1997

                                              /s/  RANDALL P. FRANK
                                              --------------------------
                                                   Randall P. Frank


<PAGE>   9
                                  SCHEDULE 13D

                                RANDALL P. FRANK
                           (Name of Reporting Person)


                                INDEX TO EXHIBITS
                                -----------------

<TABLE>
<CAPTION>
                                                                        PAGE
                                                                    SEQUENTIALLY
                                                                      NUMBERED
                                                                    ------------

<C>      <S>                                                        
10.12.A  Warrants for 1,112 shares (Warrant No. 261 - 12/01/89)

10.12.B  Warrants for 1,250 shares (Warrant No. 295 - 12/18/92)*

10.12.C  Warrants for 10,000 shares (Warrant No. 357 - 12/17/92)*

10.12.D  Warrants for 10,000 shares (Warrant No. E-1005 - 05/14/92)*

10.12.E  Warrants for 10,000 shares (Warrant No. E-1010 - 10/27/92)*

10.12.F  Stock Right Agreement No. E-1005 - 05/14/92

10.12.G  Stock Right Agreement No. E-1010 - 10/27/92
</TABLE>



<PAGE>   1
                                                             EXHIBIT (A); PAGE 1


                                 WARRANT NO. 261

         THIS WARRANT, AND THE COMMON STOCK ISSUABLE UPON ITS EXERCISE, HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD, PLEDGED,
HYPOTHECATED, OR OTHERWISE TRANSFERRED, DISPOSED OF OR OFFERED FOR SALE, IN
WHOLE OR IN PART, IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER
THAT ACT COVERING THIS WARRANT AND/OR THE COMMON STOCK ISSUABLE UPON ITS
EXERCISE, OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO HOH WATER
TECHNOLOGY CORPORATION THAT AN EXEMPTION FROM REGISTRATION IS AVAILABLE.

              ----------------------------------------------------

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                        HOH WATER TECHNOLOGY CORPORATION

              ----------------------------------------------------

         This is to Certify that, FOR VALUE RECEIVED, RANDALL P. FRANK, or
assigns, ("Holder"), is entitled to purchase, subject to the provisions of this
Warrant, from HOH WATER TECHNOLOGY CORPORATION, a California corporation
("Company"), Eleven Thousand One Hundred Eleven (11,111) fully paid, validly
issued and nonassessable shares of Common Stock, $0.01 par value, of the Company
("Common Stock") at any time or from time to time during the period from the
date hereof, through and including August 31, 1992, but not later than 5:00 P.M.
Los Angeles City Time on said date (the "Exercise Period") at an initial
exercise price equal to $1.50 per share. The number of shares of Common Stock to
be received upon the exercise of this Warrant and the price to be paid for each
share of Common Stock may be adjusted from time to time as hereinafter set
forth. The shares of Common Stock deliverable upon such exercise, and as
adjusted from time to time are hereinafter sometimes referred to as "Warrant
Shares" and the exercise price of a share of Common Stock in effect at any time
and as adjusted from time to time is hereinafter sometimes referred to as the
"Exercise Price."

                  (A) EXERCISE OF WARRANT. This Warrant may be exercised in
whole or in part at any time during the Exercise Period, and during the Exercise
Period the Holder shall have the right to exercise this Warrant into the kind
and amount of shares of stock and other securities and property (including cash)
receivable by a holder of the number of shares of Common Stock into which this
Warrant might have been exercisable immediately prior thereto. This Warrant may
be exercised by presentation and surrender hereof to the Company at its
principal office, or at the office of its stock transfer agent, if any, with the
Purchase Form annexed hereto duly executed and accompanied by payment of the
Exercise Price for the number of Warrant Shares specified in such form. As soon
as practicable after each such exercise of the Warrants, but not later than
seven (7) days from the date of such exercise, the Company shall issue and
deliver to the Holder a certificate or certificates for the Warrant Shares
issuable upon such


<PAGE>   2
                                                             EXHIBIT (A); PAGE 2


exercise, registered in the name of the Holder or its designee. If this Warrant
should be exercised in part only, the Company shall, upon surrender of this
Warrant for cancellation, execute and deliver a new Warrant evidencing the
rights of the Holder thereof to purchase the balance of the Warrant Shares
purchasable thereunder. Upon receipt by the Company of this Warrant at its
office, or by the stock transfer agent of the Company at its office, in proper
form for exercise, the Holder shall be deemed to be the holder of record of the
shares of Common Stock issuable upon such exercise, notwithstanding that the
stock transfer books of the Company shall then be closed or that certificates
representing such shares of Common Stock shall not then be physically delivered
to the Holder.

         (B) RESERVATION OF SHARES. The Company shall at all times reserve for
issuance and/or delivery upon exercise of this Warrant such number of shares of
its Common Stock as shall be required for issuance and delivery upon exercise of
the Warrants.

         (C) FRACTIONAL SHARES. No fractional shares or script representing
fractional shares shall be issued upon the exercise of this Warrant. With
respect to any fraction of a share called for upon any exercise hereof, the
Company shall pay to the Holder an amount in cash equal to such fraction
multiplied by the current market value of a share, determined as follows:

                  (1) If the Common Stock is listed on a National Securities
Exchange or admitted to unlisted trading privileges on such exchange or listed
for trading on the NASDAQ system, the current market value shall be the last
reported sale price of the Common Stock on such exchange or system on the last
business day prior to the date of exercise of this Warrant or if no such sale is
made on such day, the average closing bid and asked prices for such day on such
exchange or system; or

                  (2) If the Common Stock is not so listed or admitted to
unlisted trading privileges, the current market value shall be the mean of the
last reported bid and asked prices reported by the National Quotation Bureau,
Inc. on the last business day prior to the date of the exercise of this Warrant;
or

                  (3) If the Common Stock is not so listed or admitted to
unlisted trading privileges and bid and asked prices are not so reported, the
current market value shall be an amount, not less than book value thereof as at
the end of the most recent fiscal year of the Company ending prior to the date
of the exercise of the Warrant, determined in such reasonable manner as may be
prescribed by the Board of Directors of the Company or, if higher, $0.01 per
share.

         (D) EXCHANGE, TRANSFER, ASSIGNMENT OR LOSS OF WARRANT. This Warrant is
exchangeable, without expense, at the option of the Holder, upon presentation
and surrender hereof to the Company or at the office of its stock transfer
agent, if any, for other warrants of different denominations entitling the
holder thereof to purchase in the aggregate the same number of shares of Common
Stock purchasable hereunder. Upon surrender of this Warrant to the Company at
its principal office or at the office of its stock transfer agent, if any, with
the Assignment Form annexed hereto duly executed and funds sufficient to pay any
transfer tax, the Company shall, without charge, execute and deliver a new
Warrant I the name of the assignee named in such instrument of assignment and
this Warrant shall promptly be canceled. This Warrant may be divided or combined
with other warrants which carry the same rights upon presentation hereof at the
principal office of the Company or at the office of its stock transfer agent, if
any, together with a written notice specifying the names and denominations in
which new Warrants are to 

<PAGE>   3
                                                             EXHIBIT (A); PAGE 3



be issued and signed by the Holder hereof. The term "Warrant" as used herein
includes any Warrants into which this Warrant may be divided or exchanged. Upon
receipt of the Company of evidence satisfactory to it of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of reasonably satisfactory indemnification, and upon surrender and
cancellation of this Warrant, if mutilated, the Company will execute and deliver
a new Warrant of like tenor and date. Any such new Warrant executed and
delivered shall constitute an additional contractual obligation on the part of
the Company, whether or not this Warrant so lost, stolen, destroyed, or
mutilated shall be at any time enforceable by anyone.

         (E) RIGHTS OF THE HOLDER. The Holder shall not, by virtue hereof, be
entitled to any rights of a shareholder in the Company, either at low or equity,
and the rights of the Holder are limited to those expressed in the Warrant and
are not enforceable against the Company except to the extent set forth herein.

         (F) ANTI-DILUTION PROVISIONS. The Exercise Price in effect at any time
and the number and kind of securities purchasable upon the exercise of the
Warrants shall be subject to adjustment from time to time upon the happening of
certain events as follows:

                  (1) In case the Company shall (i) declare a dividend or make a
contribution on its outstanding shares of Common Stock in shares of Common
Stock, (ii) subdivide or reclassify its outstanding shares of Common Stock into
a greater number of shares, or (iii) combine or reclassify its outstanding
shares of Common Stock into a smaller number of shares, the Exercise Price in
effect at the time of the record date for such dividend or distribution or of
the effective date of such subdivisions, combination or reclassification shall
be adjusted so that it shall equal the price determined by multiplying the
Exercise Price by a fraction, the denominator of which shall be the number of
shares of Common Stock outstanding after giving effect to such action, and the
numerator of which shall be the number of shares of Common Stock outstanding
immediately prior to such action. Such adjustment shall be made successively
whenever any event listed above shall occur.

                  (2) Whenever the Exercise Price payable upon exercise of each
Warrant is adjusted pursuant to Subsection (1) above, the number of shares
purchasable upon exercise of this Warrant shall simultaneously be adjusted by
multiplying the number of shares initially issuable upon exercise of this
Warrant by the Exercise Price in effect on the date hereof and dividing the
product so obtained by the Exercise Price, as adjusted.

                  (3) Whenever the Exercise Price is adjusted, as herein
provided, the Company shall promptly cause a notice setting forth the adjusted
Exercise Price and adjusted number of shares issuable upon exercise of each
Warrant to be mailed to the Holders, at their last addresses appearing in the
Warrant Register, and shall cause a certified copy thereof to be mailed to its
transfer agent, if any. The Company may retain a firm of independent certificate
public accountants selected by the Board of Directors (who may be the regular
accountants employed by the Company) to make any computation required by this
Section F and a certificate signed by such firms shall be conclusive evidence of
the correctness of such adjustment.
<PAGE>   4
                                                             EXHIBIT (A); PAGE 4



                  (4) In the event that at any time, as a result of an
adjustment made pursuant to Subsection (1) above, the Holder of this Warrant
thereafter shall become entitled to receive any shares of the Company, other
than Common Stock, thereafter the number of such other shares so receivable upon
exercise of this Warrant shall be subject to adjustment from time to time in a
manner and on terms as nearly equivalent as practicable to the provisions with
respect to the Common Stock contained in Subsection (1) above.

                  (5) Irrespective of any adjustments in the Exercise Price or
the number or kind of shares purchasable upon exercise of this Warrant, Warrants
theretofore or thereafter issued may continue to express the same price and
number and kind of shares as are stated in the similar Warrants initially
issuable pursuant to this Agreement.

         (G) OFFICER'S CERTIFICATE. Whenever the Exercise Price shall be
adjusted as required by the provisions of the foregoing Section, the Company
shall forthwith file in the custody of its Secretary or an Assistant Secretary
at its principal office and with its stock transfer agent, if any, an officer's
certificate showing the adjusted Exercise Price determined as herein provided,
setting forth in reasonable detail the facts requiring such adjustment,
including a statement of the number of additional shares of Common Stock, if
any, and such other facts as shall be necessary to show the reason for and the
manner of computing such adjustment. Each such officer's certificate shall be
made available at all reasonable times for inspection by the holder or any
holder of a Warrant executed and delivered pursuant to Section A and the Company
shall, forthwith after each such adjustment, mail a copy by certified mail of
such certificate to the Holder or any such holder.

         (H) NOTICES TO WARRANT HOLDERS. So long as this Warrant shall be
outstanding, (i) if the Company shall pay any dividend or make any distribution
upon the Common Stock or (ii) if the Company shall offer to the holders of
Common Stock for subscription or purchase by them any share of any class or any
other rights or (iii) if the capital reorganization of the Company,
reclassification of the capital stock of the Company, consolidation or merger of
the Company with or into another corporation, sale, lease or transfer of all or
substantially all of the property and assets of the Company to another
corporation, or voluntary or involuntary dissolution, liquidation or winding up
of the Company shall be effected, then in any such case, the Company shall cause
to be mailed by certified mail to the Holder, at least fifteen days prior to the
date specified in (x) or (y) below, as the case may be, a notice containing a
brief description of the proposed action and stating the date on which (x) a
record is to be taken for the purpose of such dividend, distribution or rights,
or (y) such reclassification, reorganization, consolidation, merger, conveyance,
lease, dissolution, liquidation or winding up is to take place and the date, if
any is to be fixed, as of which the holders of Common Stock or other securities
shall receive cash or other property deliverable upon such reclassification,
reorganization, consolidation, merger, conveyance, dissolution, liquidation or
winding up.

         (I) RECLASSIFICATION, REORGANIZATION OR MERGER. In case of any
reclassification, capital reorganization or other change of outstanding shares
of Common Stock of the Company, or in case of any consolidation or merger of the
Company with or into another corporation (other than a merger with a subsidiary
in which merger the Company is the continuing corporation and which does not
result in any reclassification, capital reorganization or other change of
outstanding shares of Common Stock of the class issuable upon exercise of this
Warrant) or in case of any sale, lease or conveyance to another 


<PAGE>   5
                                                             EXHIBIT (A); PAGE 5


corporation of the property of the Company as an entirety, the Company shall, as
a condition precedent to such transaction, cause effective provisions to be made
so that the Holder shall have the right thereafter by exercising this Warrant at
any time prior to the expiration of the Warrant, to purchase the kind and amount
of shares of stock and other securities and property receivable upon such
reclassification, capital reorganization and other change, consolidation,
merger, sale or conveyance by a holder of the number of shares of Common Stock
which might have been purchased upon exercise of this Warrant immediately prior
to such reclassification, change, consolidation, merger, sale or conveyance. Any
such provision shall include provision for adjustments which shall be as nearly
equivalent as may be practicable to the adjustments provided for in this
Warrant. The foregoing provisions of this Section I shall similarly apply to
successive reclassifications, capital reorganizations and changes of shares of
Common Stock and to successive consolidations, mergers, sales or conveyances. In
the event that in connection with any such capital reorganization or
reclassification, consolidation, merger, sale or conveyance, additional shares
of Common Stock shall be issued in exchange, conversion, substitution or
payment, in whole or in part, for a security of the Company other than Common
Stock, any such issue shall be treated as an issue of Common Stock covered by
the provisions of Subsection (1) of Section F hereof.

         IN WITNESS THEREOF, the Company has caused this Warrant to be signed
and attested by the Undersigned, being duly authorized, as of the date set forth
on the first part hereof.

                                          HOH WATER TECHNOLOGY CORPORATION

                                          By: /s/ CATHERINE PATTERSON
                                             ---------------------------
                                                  Catherine Patterson
                                                  Corporate Secretary


<PAGE>   6
                                                             EXHIBIT (A); PAGE 6


                                  PURCHASE FORM
                                  -------------


                                               Dated:____________________, 19___

The undersigned hereby irrevocably elects to exercise the within Warrant to the
extent of purchasing _________________ shares of Common Stock and hereby makes
payment of $____________________ in payment of the actual exercise price
thereof.


      =====================================================================


                     INSTRUCTIONS FOR REGISTRATION OF STOCK
                     --------------------------------------


Name ________________________________________________________________________
                  (Please typewrite or print in block letters)

Address ______________________________________________________________________



                                             -----------------------------------
                                             Signature of Warrant Holder
<PAGE>   7
                                                             EXHIBIT (A); PAGE 7


                                 ASSIGNMENT FORM
                                 ---------------
FOR VALUE RECEIVED, _______________________________________________ (the
"Warrant Holder") hereby sells, assigns and transfers unto:

         Name     ______________________________________________________________
                       (Please typewrite or print in block letters)

         Address  ______________________________________________________________

the right to purchase Common Stock represented by this Warrant to the extent of
____________ shares as to which such right is exercisable and does hereby
irrevocably constitute and appoint ________________________________ Attorney, to
transfer the same on the books of the Company with full power of substitution in
the premises.

Dated: _________________, 19 ___

                                             -----------------------------------
                                             Signature of Warrant Holder


<PAGE>   1
                                                             EXHIBIT (B); PAGE 1



                                 WARRANT NO. 295

         THIS WARRANT, AND THE COMMON STOCK ISSUABLE UPON ITS EXERCISE, HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD, PLEDGED,
HYPOTHECATED, OR OTHERWISE TRANSFERRED, DISPOSED OF OR OFFERED FOR SALE, IN
WHOLE OR IN PART, IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER
THAT ACT COVERING THIS WARRANT AND/OR THE COMMON STOCK ISSUABLE UPON ITS
EXERCISE, OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO HOH WATER
TECHNOLOGY CORPORATION THAT AN EXEMPTION FROM REGISTRATION IS AVAILABLE.

              ----------------------------------------------------

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                        HOH WATER TECHNOLOGY CORPORATION

              ----------------------------------------------------

         This is to Certify that, FOR VALUE RECEIVED, RANDALL P. FRANK, or
assigns, ("Holder"), is entitled to purchase, subject to the provisions of this
Warrant, from HOH WATER TECHNOLOGY CORPORATION, a California corporation
("Company"), Twelve Thousand Five Hundred (12,500) fully paid, validly issued
and nonassessable shares of Common Stock, $0.01 par value, of the Company
("Common Stock") at any time or from time to time during the period from the
date hereof, through and including May 31, 1992, but not later than 5:00 P.M.
Los Angeles City Time on said date (the "Exercise Period") at an initial
exercise price equal to $0.90 per share. The number of shares of Common Stock to
be received upon the exercise of this Warrant and the price to be paid for each
share of Common Stock may be adjusted from time to time as hereinafter set
forth. The shares of Common Stock deliverable upon such exercise, and as
adjusted from time to time are hereinafter sometimes referred to as "Warrant
Shares" and the exercise price of a share of Common Stock in effect at any time
and as adjusted from time to time is hereinafter sometimes referred to as the
"Exercise Price."

                  (A) EXERCISE OF WARRANT. This Warrant may be exercised in
whole or in part at any time during the Exercise Period, and during the Exercise
Period the Holder shall have the right to exercise this Warrant into the kind
and amount of shares of stock and other securities and property (including cash)
receivable by a holder of the number of shares of Common Stock into which this
Warrant might have been exercisable immediately prior thereto. This Warrant may
be exercised by presentation and surrender hereof to the Company at its
principal office, or at the office of its stock transfer agent, if any, with the
Purchase Form annexed hereto duly executed and accompanied by payment of the
Exercise Price for the number of Warrant Shares specified in such form. As soon
as practicable after each such exercise of the Warrants, but not later than
seven (7) days from the date of such exercise, the Company shall issue and
deliver to the Holder a certificate or certificates for the Warrant Shares
issuable upon such



<PAGE>   1
                                                             EXHIBIT (C); PAGE 1



                                 WARRANT NO. 357

         THIS WARRANT, AND THE COMMON STOCK ISSUABLE UPON ITS EXERCISE, HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD, PLEDGED,
HYPOTHECATED, OR OTHERWISE TRANSFERRED, DISPOSED OF OR OFFERED FOR SALE, IN
WHOLE OR IN PART, IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER
THAT ACT COVERING THIS WARRANT AND/OR THE COMMON STOCK ISSUABLE UPON ITS
EXERCISE, OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO HOH WATER
TECHNOLOGY CORPORATION THAT AN EXEMPTION FROM REGISTRATION IS AVAILABLE.

              ----------------------------------------------------

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                        HOH WATER TECHNOLOGY CORPORATION

              ----------------------------------------------------

         This is to Certify that, FOR VALUE RECEIVED, RANDALL P. FRANK, or
assigns, ("Holder"), is entitled to purchase, subject to the provisions of this
Warrant, from HOH WATER TECHNOLOGY CORPORATION, a California corporation
("Company"), One Hundred Thousand (100,000) fully paid, validly issued and
nonassessable shares of Common Stock, $0.01 par value, of the Company ("Common
Stock") at any time or from time to time during the period from the date hereof,
through and including December 17, 2002, but not later than 5:00 P.M. Los
Angeles City Time on said date (the "Exercise Period") at an initial exercise
price equal to $1.25 per share. The number of shares of Common Stock to be
received upon the exercise of this Warrant and the price to be paid for each
share of Common Stock may be adjusted from time to time as hereinafter set
forth. The shares of Common Stock deliverable upon such exercise, and as
adjusted from time to time are hereinafter sometimes referred to as "Warrant
Shares" and the exercise price of a share of Common Stock in effect at any time
and as adjusted from time to time is hereinafter sometimes referred to as the
"Exercise Price."

                  (A) EXERCISE OF WARRANT. This Warrant may be exercised in
whole or in part at any time during the Exercise Period, and during the Exercise
Period the Holder shall have the right to exercise this Warrant into the kind
and amount of shares of stock and other securities and property (including cash)
receivable by a holder of the number of shares of Common Stock into which this
Warrant might have been exercisable immediately prior thereto. This Warrant may
be exercised by presentation and surrender hereof to the Company at its
principal office, or at the office of its stock transfer agent, if any, with the
Purchase Form annexed hereto duly executed and accompanied by payment of the
Exercise Price for the number of Warrant Shares specified in such form. As soon
as practicable after each such exercise of the Warrants, but not later than
seven (7) days from the date of such exercise, the Company shall issue and
deliver to the Holder a certificate or certificates for the Warrant Shares
issuable upon such



<PAGE>   1
                                                             EXHIBIT (D); PAGE 1



                               WARRANT NO. E-1005

         THIS WARRANT, AND THE COMMON STOCK ISSUABLE UPON ITS EXERCISE, HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD, PLEDGED,
HYPOTHECATED, OR OTHERWISE TRANSFERRED, DISPOSED OF OR OFFERED FOR SALE, IN
WHOLE OR IN PART, IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER
THAT ACT COVERING THIS WARRANT AND/OR THE COMMON STOCK ISSUABLE UPON ITS
EXERCISE, OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO HOH WATER
TECHNOLOGY CORPORATION THAT AN EXEMPTION FROM REGISTRATION IS AVAILABLE.

              ----------------------------------------------------

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                        HOH WATER TECHNOLOGY CORPORATION

              ----------------------------------------------------

         This is to Certify that, FOR VALUE RECEIVED, RANDALL P. FRANK, or
assigns, ("Holder"), is entitled to purchase, subject to the provisions of this
Warrant, from HOH WATER TECHNOLOGY CORPORATION, a California corporation
("Company"), One Hundred Thousand (100,000) fully paid, validly issued and
nonassessable shares of Common Stock, $0.01 par value, of the Company ("Common
Stock") at any time or from time to time during the period from the date hereof
until the first to occur to (i) the exercise by HOH of Right provided in and
defined in Section 3(b) of that certain Master Agreement between HOH and
Electropure, Inc., a California corporation, dated July 29, 1992, or (ii) 5:00
P.M. Los Angeles City Time on January 31, 1998 (the "Exercise Period") at an
initial exercise price equal to $0.05 per share. The number of shares of Common
Stock to be received upon the exercise of this Warrant and the price to be paid
for each share of Common Stock may be adjusted from time to time as hereinafter
set forth. The shares of Common Stock deliverable upon such exercise, and as
adjusted from time to time are hereinafter sometimes referred to as "Warrant
Shares" and the exercise price of a share of Common Stock in effect at any time
and as adjusted from time to time is hereinafter sometimes referred to as the
"Exercise Price."

                  (A) EXERCISE OF WARRANT. This Warrant may be exercised in
whole or in part at any time during the Exercise Period, and during the Exercise
Period the Holder shall have the right to exercise this Warrant into the kind
and amount of shares of stock and other securities and property (including cash)
receivable by a holder of the number of shares of Common Stock into which this
Warrant might have been exercisable immediately prior thereto. This Warrant may
be exercised by presentation and surrender hereof to the Company at its
principal office, or at the office of its stock transfer agent, if any, with the
Purchase Form annexed hereto duly executed and accompanied by payment of the
Exercise Price for the number of Warrant Shares specified in such form. As soon
as practicable after each such exercise of the Warrants, but not later than
seven (7) days from the date of such exercise, the Company shall issue and
deliver to the Holder a certificate or certificates for the Warrant Shares
issuable upon such



<PAGE>   1
                                                             EXHIBIT (E); PAGE 1



                               WARRANT NO. E-1010

         THIS WARRANT, AND THE COMMON STOCK ISSUABLE UPON ITS EXERCISE, HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD, PLEDGED,
HYPOTHECATED, OR OTHERWISE TRANSFERRED, DISPOSED OF OR OFFERED FOR SALE, IN
WHOLE OR IN PART, IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER
THAT ACT COVERING THIS WARRANT AND/OR THE COMMON STOCK ISSUABLE UPON ITS
EXERCISE, OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO HOH WATER
TECHNOLOGY CORPORATION THAT AN EXEMPTION FROM REGISTRATION IS AVAILABLE.

              ----------------------------------------------------

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                        HOH WATER TECHNOLOGY CORPORATION

              ----------------------------------------------------

         This is to Certify that, FOR VALUE RECEIVED, RANDALL P. FRANK, or
assigns, ("Holder"), is entitled to purchase, subject to the provisions of this
Warrant, from HOH WATER TECHNOLOGY CORPORATION, a California corporation
("Company"), One Hundred Thousand (100,000) fully paid, validly issued and
nonassessable shares of Common Stock, $0.01 par value, of the Company ("Common
Stock") at any time or from time to time during the period from the date hereof
until the first to occur to (i) the exercise by HOH of Right provided in and
defined in Section 3(b) of that certain Master Agreement between HOH and
Electropure, Inc., a California corporation, dated July 29, 1992, or (ii) 5:00
P.M. Los Angeles City Time on January 31, 1998 (the "Exercise Period") at an
initial exercise price equal to $0.05 per share. The number of shares of Common
Stock to be received upon the exercise of this Warrant and the price to be paid
for each share of Common Stock may be adjusted from time to time as hereinafter
set forth. The shares of Common Stock deliverable upon such exercise, and as
adjusted from time to time are hereinafter sometimes referred to as "Warrant
Shares" and the exercise price of a share of Common Stock in effect at any time
and as adjusted from time to time is hereinafter sometimes referred to as the
"Exercise Price."

                  (A) EXERCISE OF WARRANT. This Warrant may be exercised in
whole or in part at any time during the Exercise Period, and during the Exercise
Period the Holder shall have the right to exercise this Warrant into the kind
and amount of shares of stock and other securities and property (including cash)
receivable by a holder of the number of shares of Common Stock into which this
Warrant might have been exercisable immediately prior thereto. This Warrant may
be exercised by presentation and surrender hereof to the Company at its
principal office, or at the office of its stock transfer agent, if any, with the
Purchase Form annexed hereto duly executed and accompanied by payment of the
Exercise Price for the number of Warrant Shares specified in such form. As soon
as practicable after each such exercise of the Warrants, but not later than
seven (7) days from the date of such exercise, the Company shall issue and
deliver to the Holder a certificate or certificates for the Warrant Shares
issuable upon such



<PAGE>   1
                                                             EXHIBIT (F); PAGE 1


                              STOCK RIGHT AGREEMENT

                                   NO. E-1005

         THIS STOCK RIGHT AGREEMENT (the "Agreement") is made and entered into
as of July 29, 1992, by and between RANDALL P. FRANK ("Investor") and HOH WATER
TECHNOLOGY CORPORATION, a California Corporation ("HOH"), with respect to the
following factsd:

         A. HOH has entered into a Master Agreement dated July 29, 1992 and
Amendments to such Master Agreement, with ELECTROPURE, INC., a California
corporation ("Electropure").

         B. Investor is an investor in Electropure.

         C. The Master Agreement provides for HOH to enter into this Agreement
with Investor.

         NOW, THEREFORE, in consideration of the foregoing facts and the mutual
covenants and agreements contained herein, the parties hereby agree as follows:

         1. RIGHT TO PURCHASE SHARES. HOH hereby grants to Investor the right
(the "Preferential Right") to purchase shares of HOH Common Stock or Preferred
Stock (the "Shares") as set forth herein. Investor shall have the Preferential
Right to purchase any Shares HOH offers to any bona fide third party for cash
and/or cancellation of indebtedness, provided, however, Investor shall have the
right and priority to purchase only that percentage of the Shares offered as his
investment in Electropure bears to the total investments in Electropure by all
other investors of Electropure who have entered into substantially similar Stock
Right Agreements and desire to purchase Shares, unless cuh other Investor does
not or cannot purchase his full allocated share of the Shares, in which case,
the balance of the Shares not being purchased shall be allocated again based on
the investments in Electropure. Notwithstanding the above, Investor shall not be
able to purchase Shares under this Agreement with an aggregate Purchase Price
(as defined in Section 2 hereof) of more than Twenty Five Thousand ($25,000.00)
Dollars.

         2. PURCHASE PRICE. The total purchase price per Share shall be
seventy-five percent (75%) of the price the third party investor has agreed in
writing to purchase all the Shares for.

         3. MECHANICS. Before HOH can enter into a valid sale or transfer of any
Shares which the Investor has a Preferential Right to purchase herein, HOH shall
first offer such Shares to the Investor and the other investors in Electropure
in the manner set forth below:

                  3.1. HOH shall deliver written notice to the Investor and the
other investors in Electropure stating the name and address of each prospective
bona fide third party purchasers, the bona fide price, terms and conditions of
such proposed sale or transfer, and written evidence of the intentioned
purchasers' agreement to purchase and ability to purchase such Shares.

                  3.2. Upon receipt of the notice from HOH, the Investor shall
have the Preferential Right to purchase certain of the Shares specified in the
notice by delivery to HOH, by certified or registered mail or by hand, a written
offer to purchase a specific number of the Shares or the Investors'


<PAGE>   2
                                                             EXHIBIT (F); PAGE 2



percentage subject to the notice, upon the terms enclosed in HOH's notice
(subject to the Purchase Price set forth in Section 2 hereof). Such offer must
be delivered to HOH within fourteen (14) days after mailing or delivery of the
notice to the Investor.

                  3.3. If the Investor and all other investors in Electropure
fail to agree to purchase ALL Shares set forth in the HOH notice in accordance
with the provisions of this Agreement and substantially similar Stock Right
Agreements, HOH shall at the end of such fourteen (14) day period, inform
Investor of the failure of Investor and the other investors in Electropure to
agree to purchase all the Shares and unless within five (5) days after receipt
by Investor of such second notice, HOH receives the written agreement to
purchase ALL Shares in the first notice from the Investor and/or the other
investors in Electropure, ALL Shares identified in the notice of intention to
sell or transfer may be sold or transferred at any time within ninety (90) days
after the date of such first notice by HOH, and Investor and all other investors
in Electropure shall not have the right to purchase the Shares. If the proposed
transferee fails to purchase such Shares according to these terms, within ninety
(90) days after the date of HOH's first notice, then the Investor must again be
given the option to purchase such Shares in the manner set forth in this Section
3.

         4. TRANSFERS AND DELIVERY OF PURCHASE PRICE. The Shares shall be
purchased by Investor within ten (10) days after HOH notifies Investor that
Investor and other investors in Electropure have elected to purchase all the
Shares offered in accordance with the terms, conditions and procedures set forth
herein. By the close of business on such tenth day, HOH shall deliver to
Investor, Stock Certificates for the Shares to be purchased by Investor upon
delivery of the Purchase Price for such Shares being purchased by Investor.
Payment shall be made by Investor by cash or a certified check payable to HOH.

         5. REPRESENTATIONS AND WARRANTIES BY HOH.

                  5.1. The Company is a corporation duly incorporated, validly
existing and in good standing under the laws of the State of California, has the
corporate power and authority to own or lease its properties and to carry on its
business as now being conducted.

                  5.2. The Company has the power to enter into this Agreement,
and this Agreement has been duly executed and delivered and constitutes a valid
and binding obligation of the Company.

                  5.3. The Shares, when issued, will be duly and validly
authorized, fully paid and nonassessable.

         6. REPRESENTATIONS AND WARRANTIES OF INVESTOR. Investor represents and
warrants to HOH that:

                  6.1. The Shares will be acquired by Investor for investment
for an indefinite period, for Investor's own account, not as a nominee or agent,
and not with a view to the sale or distribution of any part thereof, and the
Investor will not have at the time of the purchase of any Shares a then present
intention of selling, granting participation in, or otherwise distributing the
same.
<PAGE>   3
                                                             EXHIBIT (F); PAGE 3



                  6.2. Investor understands that the Shares will not have been
registered under the Securities Act of 1933, as amended (the "Act"), in reliance
upon the exemptions from the registration provisions of the Act contained in
Section 4(2) thereof.

                  6.3. At the time of purchase of any of the Shares, Investors
will (i) have adequate means of providing for his current needs and possible
personal contingencies, (ii) have no need for liquidity in the investment in the
Shares, (iii) be able to bear the substantial economic risks of an investment in
the Shares for an indefinite period, (iv) be able to afford a complete loss of
such investment, and (v) will not have an overall commitment to investments
which are not readily marketable that is disproportionate to Investor's net
worth, and the Investor's investment in the Shares will not cause such overall
commitment to become excessive.

                  6.4. At the time of any purchase of the Shares, Investor will
be an "accredited investor" (as set forth in Regulation D promulgated under the
Act) and the undersigned's total investment in the Shares will not then exceed
10% of the Investor's net worth or joint net worth with the Investor's spouse.

                  6.5. Investor understands that the Shares must be held
indefinitely unless the sale or other transfer thereof is subsequently
registered under the Act, or an exemption from such registration is available.
Investor further understands that HOH is under no obligation to register the
Shares on his behalf or to assist him in complying with any exemption from
registration except as otherwise provided herein.

                  6.6. Investor agrees not to transfer the Shares without
registering them under applicable federal or state securities laws unless the
transfer is exempt from registration. Investor realizes that HOH may not allow a
transfer of Shares unless the transferee is also an "accredited investor".
Investor understands that legends will be placed on certificates representing
the Shares, with respect to the above restrictions on resale or other
disposition of the Shares and that stop transfer instructions have or will be
placed with respect to the Shares so as to restrict the assignment, resale or
other disposition thereof.

                  6.7. HOH will direct its transfer agent to place such a stop
transfer order in its books respecting transfer of the Shares, and the
certificate or certificates representing the Shares will bear the following
legend or a legend substantially similar thereto:

                  "THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE
                  SECURITIES ACT OF 1933. THEY MAY NOT BE SOLD OR OFFERED FOR
                  SALE IN THE ABSENCE OF: (1) AN EFFECTIVE REGISTRATION
                  STATEMENT AS TO THE SECURITIES UNDER THAT ACT, OR (2) AN
                  OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH
                  REGISTRATION IS NOT REQUIRED."

                  6.8. Investor understands that Rule 144, promulgated by the
Securities and Exchange Commission under the Act, is not currently available for
sale of the Shares, and there is no assurance that it will be available at any
particular time in the future. If and when Rule 144 is available for sale of the
Shares, such sales in reliance upon Rule 144 may only be (i) in limited
quantities after the securities have been held for two years after being sold by
HOH or an affiliate of HOH, or (ii) in unlimited quantities by non-affiliates
after the securities have been held for three years after being sold by HOH or
an affiliate of HOH, in each case in accordance with the conditions of the Rule,
all of which must be met (including the 
<PAGE>   4
                                                             EXHIBIT (F); PAGE 4



requirement, if applicable, that adequate information concerning HOH is then
available to the public). HOH has no obligation to supply the information
required for sales under Rule 144.

                  6.9. Any notice to HOH provided under Section 5 hereof to
purchase any Shares shall contain a current reaffirmation of the representations
and warrants contained in this Section 6 as a condition to the purchase of any
Shares.

         7. EXCEPTIONS. The Preferential Right set forth in Section I hereof to
purchase Shares shall not apply to any sale of Shares not solely for cash and/or
cancellation of indebtedness, to any sales to employees of HOH or any
subsidiary, or to any merger, reorganization or acquisition involving HOH or
sale of all or substantially all the assets of HOH.

         8. REGISTRATION RIGHTS. The Shares issued pursuant to this Agreement
shall be subject to the same registration rights as provided for the "Warrant
Shares" in Section (i) of the Warrant between the Company and the Investor dated
June _, 1992. For purpose thereof, "Warrant Shares" in the Warrant shall refer
to the Shares and the parties hereto shall have the same rights and duties
regarding the Shares as provided in Section (j) as to the Warrant Shares.

         9. ENTIRE AGREEMENT. This Agreement and the Warrant Agreement embodies
the entire agreement and understanding between the parties hereto with respect
to the subject matter hereof and supersedes all prior and contemporaneous
agreements and understandings relating to such subject matter.

         10. AMENDMENT. This Agreement may not be amended except by written
document executed by the parties.

         11. SUBJECT HEADINGS. Subject headings are included for convenience
only and shall not be deemed part of this Agreement.

         12. SEVERABILITY. If any provision of this Agreement shall be held
unenforceable as applied to any circumstance, the remainder of this Agreement
and the application of such provision to other circumstances shall be
interpreted so as best to effect the intent of the parties. The parties further
agree to replace any such unenforceable provision with an enforceable provision
(and to take such other action) which will achieve, to the extent possible, the
purposes of the unenforceable provision.

         13. CHOICE OF LAW AND VENUE. This Agreement shall be governed by and
construed under the laws of the State of California in force from time to time.
Any proceeding arising out of this Agreement shall be brought in orange County,
California.

         14. ATTORNEYS' FEES. In any action to enforce this Agreement, the
prevailing party shall be entitled to recover from the non-prevailing party all
reasonable costs, including, without limitation, attorneys' fees.

         15. ADDITIONAL DOCUMENTS. The parties agree to execute such additional
documents and perform such other acts as may be necessary or appropriate to
achieve the purposes of this Agreement.
<PAGE>   5
                                                             EXHIBIT (F); PAGE 5


         16. NON-WAIVER. No waiver by a party of any failure by the other party
to keep any provision of this Agreement shall be deemed a waiver of any
preceding or succeeding breach of the same or any other provision.

         17. PARTIES BOUND. This Agreement is binding on and shall inure to the
benefit of the parties and their respective successors, assigns, heirs, and
legal representatives.

         18. NUMBER AND GENDER. Wherever required by the context hereof, the
singular shall include the plural and vice versa, and the neuter gender shall
include the masculine and feminine genders, and vice versa; the word "person"
shall include a natural person and a corporation, partnership, firm or other
form of association; the word "or" is not exclusive; and the words "herein,"
"hereof" and "hereunder" refer to this Agreement as a whole and not merely to a
subdivision in which such words appear unless the context expressly requires
otherwise.

         19. EXPENSES. HOH and Investor shall each be responsibl e for the
payment of their own expenses incurred in connection with this Agreement and the
transactions contemplated hereunder.

         20. JOINT PREPARATION. This Agreement shall be interpreted as if
prepared jointly by the parties.

         21. SURVIVAL. The representations, warranties, covenants, and
agreements contained in this Agreement shall survive the consummation of the
transactions contemplated hereby.

         22. COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original but all of which
together shall constitute one and the same instrument.

         IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first above written.

         HOH:                                HOH WATER TECHNOLOGY CORPORATION


                                             By: /s/ CATHERINE PATTERSON
                                                ----------------------------
                                                     Catherine Patterson
                                                     Chief Financial Officer

                                             Address:

                                             P.O. Box 3613
                                             Laguna Hills, California 92654-3613


         Investor:                           /s/ RANDALL P. FRANK
                                             -----------------------
                                                 Randall P. Frank

                                             Address:

                                             320 Meadowood Court
                                             Pleasant Hill, CA 94523-3176



<PAGE>   1
                                                             EXHIBIT (G); PAGE 1


                              STOCK RIGHT AGREEMENT

                                   NO. E-1010

         THIS STOCK RIGHT AGREEMENT (the "Agreement") is made and entered into
as of July 29, 1992, by and between RANDALL P. FRANK ("Investor") and HOH WATER
TECHNOLOGY CORPORATION, a California Corporation ("HOH"), with respect to the
following factsd:

         A. HOH has entered into a Master Agreement dated July 29, 1992 and
Amendments to such Master Agreement, with ELECTROPURE, INC., a California
corporation ("Electropure").

         B. Investor is an investor in Electropure.

         C. The Master Agreement provides for HOH to enter into this Agreement
with Investor.

         NOW, THEREFORE, in consideration of the foregoing facts and the mutual
covenants and agreements contained herein, the parties hereby agree as follows:

         1. RIGHT TO PURCHASE SHARES. HOH hereby grants to Investor the right
(the "Preferential Right") to purchase shares of HOH Common Stock or Preferred
Stock (the "Shares") as set forth herein. Investor shall have the Preferential
Right to purchase any Shares HOH offers to any bona fide third party for cash
and/or cancellation of indebtedness, provided, however, Investor shall have the
right and priority to purchase only that percentage of the Shares offered as his
investment in Electropure bears to the total investments in Electropure by all
other investors of Electropure who have entered into substantially similar Stock
Right Agreements and desire to purchase Shares, unless cuh other Investor does
not or cannot purchase his full allocated share of the Shares, in which case,
the balance of the Shares not being purchased shall be allocated again based on
the investments in Electropure. Notwithstanding the above, Investor shall not be
able to purchase Shares under this Agreement with an aggregate Purchase Price
(as defined in Section 2 hereof) of more than Twenty Five Thousand ($25,000.00)
Dollars.

         2. PURCHASE PRICE. The total purchase price per Share shall be
seventy-five percent (75%) of the price the third party investor has agreed in
writing to purchase all the Shares for.

         3. MECHANICS. Before HOH can enter into a valid sale or transfer of any
Shares which the Investor has a Preferential Right to purchase herein, HOH shall
first offer such Shares to the Investor and the other investors in Electropure
in the manner set forth below:

                  3.1. HOH shall deliver written notice to the Investor and the
other investors in Electropure stating the name and address of each prospective
bona fide third party purchasers, the bona fide price, terms and conditions of
such proposed sale or transfer, and written evidence of the intentioned
purchasers' agreement to purchase and ability to purchase such Shares.

                  3.2. Upon receipt of the notice from HOH, the Investor shall
have the Preferential Right to purchase certain of the Shares specified in the
notice by delivery to HOH, by certified or registered mail or by hand, a written
offer to purchase a specific number of the Shares or the Investors'


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